CODE SEGMENT
	ASSUME CS:CODE
START:
	MOV AL,10001011B
	MOV DX,233H
	OUT DX,AL
PRE:
	MOV DX,231H
	IN AL,DX
	MOV DX,234H
	OUT DX,AL
	JMP PRE
	MOV AX,4C00H
	INT 21H
CODE ENDS
END START
